Change in flashrom[master]: helpers.c: Fix undefined behavior in strndup()

[Angel Pons (Code Review)]

Attention is currently required from: Xiang Wang, Stefan Reinauer.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/49741 )

Change subject: helpers.c: Fix undefined behavior in strndup()
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/flashrom/+/49741/comment/72da94ff_27eaa553 
PS1, Line 7: helpers.c: optimize strndup
> Thanks a bunch for the rewrite Angel, I couldn't understand the initial msg either and was going to  […]

About adding a unit-test for this function: Maybe, but it is only used for MinGW. Moreover, I doubt unit-tests can catch undefined behavior. I don't mind if someone writes a unit-test for it, but I think there's better candidates for unit-testing.